> first, I think it would be more useful if it had an optional character > string, so users could write > > stopifnot( is.matrix(m), "m is not a matrix" ) >
Another option is to just generate better error messages automatically, e.g.: > library(assertthat) > x <- 1:10 > assert_that(is.matrix(x)) Error: x is not a matrix Hadley -- Chief Scientist, RStudio http://had.co.nz/ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
